Refrigerating apparatus.



F. KNOERR.

REFRIGERATING APPARATUS.

APPLICATION FILED MAR, 23. I91].

1,269,612. A Patented June 18, 1918.

2 SHEETSSHEET I.

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WITNESSES (Mm/w. H- MM) ATTORNEY 4 fimmmm BY Z F. KNOERR.

REFHIGERATING APPARATUS.

APPLICATION FILED MAR 23, 1911.

1 ,269, 6 1 2 Patented June 18, 1918.

2 SHEETSSHEET 2.

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ATTO R N EY INVENTOR UNITED STATES PATENT OFFICE.

FRED KNOERR, OF CHICAGO, ILLINOIS.

REFRIGERATING- APPARATUS.

Specification of Letters Patent.

Application filed March 23, 1917. Serial No. 156,875.

producing a circulation of cold air through the show case, whereby temperatures much lower than those heretofore used in refrigcrating apparatus of this kind are obtained.

.The invention in the present'instance resides in the special arrangement of ice tanks and cold storage receptacles within the refrigerator in which they are placed, and in the relation of the fan or blower with reference thereto for creating a current of cold air through the show case.

In the accompanying drawings I have illustrated one embodiment of my invention, in which:

Figure 1 is a perspective view of the apparatus.

Fig. 2 is a plan View of the same with'the top of the show case removed and with the cover of the refrigerator thrown back.

F 3 is a rear elevation of the same. F 1g. 4 is a longitudinal sectional view on the line 44 of Fig. 2, looking in the direction of the arrow.

2 preferably of glass in order that the goods may be inspected and provided at the rear with suitable doors 3 whereby access may be had to the same.

Abutting one end of the show case 1 is the combination refrigerator, freezer and cold storage cabinet 4, provided with a hinged cover 5 at the top and a suitable door 6 at one end, whereby access may be had to the various tanks and receptacles therein. Within the cabinet 4 and resting upon the bottom thereof is a drip pan 7. Mounted upon the drip pan is a reticulated grating 7 for supporting the tanks or receptacles interfere with the free circulation of air from the cabinet to'the show case and back a am. I

Spacing blocks 8 are arranged within the cabinet 4 at the upper edges of the front and rear walls thereof. Tanks 9 rest upon the grating 7 a and are spaced from the front and rear walls the width of the spacing blocks 8, whereby downwardly extending passages 10 are provided between the tanks 9 and said front and rear walls. As is clearly shown in Fig.2, these tanks are 14 and arranged behind the'door 6 whereby access may be had to the receptacle when the door is open. The wall 15 of the receptacle 13 is spaced a substantial distance a from the side of the cabinet 4 adjacent to the show case providing a space 16 between the same and said side. J Resting upon the upper end of the receptacle 13 is asecond cold storage tank or re-' ceptacle 17 open at one side, as indicated at '18, and facing the door 6 whereby access may be had to the same when the door is open. The top 19 of the receptacle 17 is closed while its vertical wall 20 is'in alinement with the vertical walls at that side of the tanks 9 and is also spaced from the wall of the cabinet 4 adjacent the show case. The cold storage receptacle 17 is retained inposition by means of clips 22 which engage the upper edges of the tanks 9 as clearly shown in Fig. 2. Shelves may be provided in the receptacles 13 and 17, as shown.

Mounted in the space betweenthe tanks -9 and receptacle 17 and the wall of the cabinet adjacent to the show case is a. cold air Patented June 18, 1248.

about to be described, so that they will not ioo tank 23, which fills the entire upperhalf of l tank 23 is mounted a fan or blower 24:. v This fan faces the wall 15 of the lower cold storage receptacle 13 and is adapted to draw cold air from the cold air space 16 and to deliver it. through a pipe 25 to the cold air tank 23. The fan is operated and controlled by a motor 26 which may be located in any suitable position inside or outside of the cabinet and which is here shown as mounted upon the inside within the space 16. Mounted upon the rear of the cabinet 4c, as shown in Fig. 3, is a suitable switch or rheostat 27 interposed in a circuit 28 connected with the motor and with a suitable source of power 29, as shown in Fig. 7. The switch or rheostat is for the purpose of controlling the speed of the motor and also for starting and stopping the same.

A thermostat 30 is also interposed in the circuit 28 and may be located in any suitable position within the show case or refrigerating cabinet, but is here shown, for the purpose of illustration, mounted in the upper inner end of the show case 1. A suitable indicator and regulator 31 is connected in any suitable manner with the thermostat and is mounted upon the rear of the show case, as shown in-IFig. 3. V

The cold air tank or chamber 23 communicates by means of short pipes 32 with the interior of the show case. These pipes 32 enter the upper part of the show case at one end thereof. Pipesv or conduits 33 are connected to and communicate with the short pipes and extend across the show case to the opposite end thereof, where they are supported and closed as indicated at 34. The pipes 33 are provided with a plurality of openings 35 upon their lower sides whereby the coldair is driven by means of the fan into the show case. As the air, within the through pipes or conduits 36 provided with openings communicating with the passages '10 and located immediately below the spacpings from the frost which is deposited upon.

the tanks and receptacles within the cabinet 4 and is provided with a suitable drain pipe 37. The tanks 9 are also provided at the lower ends thereof with faucets 38 for regulating the height of water within the same.

The tanks 9 above described are intended to be'filled with ice with which is mixed a chlorid or sodium chlorid, or any salt which show case warms, it'ascends and escapes aeaeia maintained at a very low temperature. The tanks 11 are adapted to receive pure or distilled water and as the ice in the tank 9 melts, ice will therefore, be seen that my apparatus has means for the replenishment and maintenance of its cold producing medium.

form in the tanks 11. It will, I

Another feature of the invention which serves to still further lower the temperature resides in the fan 24 mounted in the inner lower portion of the cabinet 4 to the rear of the space 16. This space, it should be by reason ofthe adjacent tanks 9, through the drip pan 7 and grating 7 up into the space 16 where it becomes cold as before, and the operation is repeated.

The fan operating in the refrigerator serves to cause a continuous circulation of the air w1th1n the show case 1, thus resulting in a thorough distribution of the chilled atmosphere and maintaining a very low temperature therein.

As here shown the motor and fan or blower are placed upon the inside of the cabinet or refrigerator 4 and are arranged with relation to the tanks and receptacles so that they will not come in contact with the same. The motor is controlled by means of the switch whereby the temperature within the show case can be regulated and it is also preferable to provide the automatic control or thermostat for maintaining the temperature within the show case constant and definite.

My invention is not intended to be limited to a show case as it is applicable to refrigerators, ice-boxes, and cold storage rooms of all kinds.

While I have shown and described one embodiment of my invention, it is to be understood that I do not desire to be limited to the details of construction herein shown and will absorb heat when dissolved. It will be seen that by mixing a salt with the-ice in the receptacles or tanks 9 a very low temperature can be obtained. The tanks v9 are arranged at each side of the cold storage receptacles 13 and 17 so that the latter will be described, for obvious modifications will be apparent to anyone skilled in the art.

What is claimed is 1. In a refri crating apparatus, a cabinet containin ta s spaced from the bottom thereof a apted to contain ice or a freezing mixture and havin therebetween a cold air space, a blower in said cold air space, a

show case, a'conduit connecting said blower with said show case, said tanks being spaced from opposite walls of said cabinet providing passages, and conduits connecting said show case with the passages.

2. In a refrigeratin apparatus,.a cabinet containing a pair 0 spaced apart tanks aez. ted to receive ice or a freezin mixture cold storage receptacles mounted between said tanks and providing therewith a central cold air space, a show case, a blower mounted within said cabinet adjacent to said cold air space and communicating with said show case, the walls of said cabinet and said tanks forming passages, and return conduits connecting said show case with said passages.

8. In a refrigerating apparatus, a cabinet, a grating located at the bottom of said cabinet, a pair oftanks adapted to receive ice or I a freezing mixture mounted within the cabinet and spaced apart, a cold storage receptacle resting upon said grating and located between said tanks, a second cold storage receptacle mounted above said firstmentioned receptacle and extending beyond the end thereof providing a cold air space between the tanks and said receptacles, a show case, a blower within said cabinet adjacent to said space, and conduits connecting sage, said tanks and receptacles providing between the same a central space communieating with said side and bottom passages, a show case, and a blower mounted in said cabinet adjacent to said central space and adapted to blow cold air into said show case.

5. The combination with a show case, of a refrigerator comprising a cabinet adjacent to said show case, tanks within said cabinet spaced from each other and from certain of the walls of the cabinet forming passages communicating with the show case, cold storage receptacles mounted between said tanks, a drip pan within the bottom of the cabinet, a reticulated grating mounted upon said drip pan for supporting the tanks and receptacles, the lower ofsaid receptacles being spaced a substantial distance from the wall of the cabinet adjacent to the show case, providing a cold air space therein, a cold air tank interposed in the upper end of said cabinet between said tanks and the upper of said receptacles and the wall of the cabinet adjacent to the case, a blower or fan" mounted within said cabinet below said cold air tank and connected to the latter, and a connection between said cold air tank and said show case whereby cold air is driven from said space into the show case and re turned through said passages and up through the grating back into thecold air space.

6. In a refrigerating apparatus, a cabinet having a grating resting upon the bottom thereof, a pair of spacing blocks at the upper edges of a pair of opposed walls of said cabinet, tanks adapted to receive ice or a freezing mixture mounted in said cabinet and spaced apart providing passages between the tanks and the opposite walls below said spacing blocks, a cold storage receptacle resting upon said grating between said tanks and of a width less than said tanks, a second cold storage receptacle mounted between the tanks above said first receptacle, and of a width substantially equal to that of said tanks whereby a central cold air space is provided between the tanks and below said second receptacle, a cold air tank mounted within said cabinet between said tanks and upper receptacle and another wall of said cabinet, a blower mounted within the cabinet below said cold air tank and communicating with the latter and with said central cold air space, a show case, and conduits connecting said show case with said cold air tank and with said passages.

7. In a refrigerating apparatus, a cabinet containing a pair of tanksspaced from each other and from a pair of opposite walls providing side passagesbetween the same and the walls, means for supporting said tanks spaced from the bottom forming a bottom passage communicating with the side passages, cold storage receptacles of unequal size mounted .within the cabinet between the tanks and forming therewith a central cold air space communicating with the .bottom passage, a cold air tank mounted in the upper portion of said cabinet between said tanks and another wall of the cabinet, a blower mounted below said cold air tank adjacent to said central air space, a show case,

conduits connectin said cold air tank with said show case w ereby cold air can be forced into the same, and return conduits connecting said show case with said side passages. 

